A kind of anti-force drag cable hanging basket preloading device and its implementation method

Abstract

The invention discloses a counter-force type stay rope hanging basket prepressing device. The counter-force type stay rope hanging basket prepressing device is characterized by comprising a preserved hole, a front cushion board, a rear cushion board, a leveling layer, a connection beam, a cushion beam and a thrust system, the preserved hole is preserved before a poured beam section is poured, a Bailey counter-force beam is anchored at the preserved hole of the poured beam section through an anchoring piece and the connection beam, the cushion beam is arranged at the position of a jack at the front end, a jack base and the jack are arranged at a beam section to be poured on a hanging basket bearing platform, the thrust system is a component of a stay rope hanging basket, the top end of the thrust system is fixed to the poured beam section, the bottom is connected with the hanging basket bearing platform to bear the horizontal component force of a stay cable, and the hanging basket bearing platform is a component of the stay rope hanging basket and is suspended on the poured beam section through a rear suspension rod and a front suspension rod of the stay rope hanging basket. Loads are applied to the hanging basket bearing platform through the hydraulic jack arranged between the Bailey counter-force beam anchored on the poured beam section and the steel bar base on the hanging basket bearing platform, and the purpose of prepressing on the stay rope hanging basket is achieved.

Description

technical field [0001] The invention relates to a counterforce type dragline hanging basket preloading device and an implementation method thereof. Background technique [0002] The cantilever cast-in-place construction of the cable hanging basket is a common method for the main girder construction of long-span cable-stayed bridges at present, and the cable hanging basket must be pre-pressed before cantilever pouring to ensure the safety of the hanging basket structure and construction, and to eliminate the hanging basket. The inelastic deformation provides the basis for the stiffness of the hanging basket for construction control, and is used to guide the later construction, ensuring that the alignment of the bridge meets the specifications and design requirements. At present, the preloading method of dragline hanging basket at home and abroad mainly adopts the heaping method (sand bag heaping and steel bar heaping), the water tank loading method, and the steel strand rever...

AI Technical Summary

Problems solved by technology

At present, the preloading method of dragline hanging basket at home and abroad mainly adopts the heaping method (sand bag heaping and steel bar heaping), the water tank loading method, and the steel strand reverse pull method. The first two methods require a large amount of material input, horizontal transfer and vertical transportation. The number of times, the large amount of construction work, the long duration, and the occupation of horizontal and vertical transport machinery and equipment hinder the construction of other working surfaces, especially for projects with tight construction schedules, which directly and indirectly affect the economic and construction period benefits of the project

The steel strand reverse pull method is simple, convenient, time-consuming, and less difficult. It is more suitable for the preloading of the hanging basket in the valley, but the elongation of the steel strand has a certain influence on the accuracy of the preloading result of the hanging basket.

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